1983-2117 1983-2117 S1983-21172006000200147 10.1590/1983-21172006080206 Brazil Brazil 00 12 2006 00 12 2006 8 2 147 160

2a. ed 9 2 2 95-111 21 1-2 1-2 23-37 15 29 29 105-27